Magnetic track brake system



May 12, 1936.

T. H. scHoEPF ET A1. MAGNETIC TRACK BRAK-E SYSTEM Filed Dec. 22, 1934 '4 Sheets-Sheet l 1 l l l l llJ m Tn w "Wh, mwkwhw um. NWNWM K m mgm G hwun/ mhww MW n WW n -mL WN May 12, 1936.

T. H. SCHOEPF ET AL MAGNETIC TRACKBRAKE SYSTEM Filed Dec. 22,. 15234 4 Sheets-Sheet' 2' www Trams/73 May 12, 1936.' T. H. SCHOEPF ET AL '2,040,814

' MAGNETIC TRACK BRAKE SYSTEM I 4 Sheets-Sheet 5 um hm Wm. m

m mm 0/ MM M MMF. M VEM Y l NR r /00 A fa m May l2, 1936. T. H. scHox-:PF ET Al.A 2,040,8l4

MAGNETIC TRACK BRAKE SYSTEM Filed. Dec. 22, 1934 4 Sheets-Sheet 4 MM f6/Mm I l Patented May 12, 1936 l UNT-TED? STATES PATENT oFFlcE MAGNETIC TRACK BRAKE SYSTEM Theodore H. Schoepf and David M. Ritchie, Cincinnati, Ohio, assignors to The Cincinnati Traction Bldg. Company, Cincinnati, Ohio, a corporation of Ohio Application December 22, 1934, Serial No: 758,787

13 Claims. (Cl..3033)r v Our invention relates to magnetic track brak- Figure' 6 iS a; Similar'VSW ShOWllg them Ir ining apparatus and methods of braking dependent or ordinary or straight air application. In particular it is our object to provide a mag- Figure '7 isa detail View of an alternative connetic brake system operable upon power failure, struction by which, when the power fails; the no- 6 and associated with means to aetuatev the magvoltage solenoid will serve to" exhaust the emer- 5 netic brake system when the independent air is geny 01" train 1111 air Dip@ and ai? the Same time applied', or automatically when some predeterprovide for the application of air to movethe conmined condition, such'as an emergency arises. troller and Connect thev emergency* electrical It is the object of our invention to provide a source to themagnetic brakev system;

10 magnetic brake system whichV is automatically Referring to thel drawings in detail, the'followf 10' applied and energized from an independent elecing is the arrangement of the electrical and pneutrical source when the main power source, which matic circuits:

normally energizes the magnetic brakes and i which is also used as a source of motive power, Ezecmcaz cwcmt fails. In such a condition it is our object to pro- The trouey Wheel harp and pole .structure is 115 vide means of applying and energizing thebrake's designated by the numeral I. Any other equivabythe control of the air'pressure operated by the' lent OI'III 0f C011Cti`r1g pOWeI'v fOI the Operation operator', and utilizing the main power current of the car and the supplyingv of current for brake for energization of the brakes; and also associate magnetizatOn PUIPOSQS may be emplOyed, Such with the system so described an automatic air apas a contact shoe on the third rail, and the like. 20 plication of the magnetic track brakes, which The line 2 having a resistance 3 therein is conserves to apply them and connect electricalmeans nected at junction 4` to the' bus lines 5 and 6 for to energize them upon the decrease of pressure train line operation.- The wire 'l is connected to of the air, this last-mentioned method of' applythe junctionpoint 8l The junction point 8` is ing the magnetic brakes and energizing them beconnected by a wire 9 on the righthand thereof 25 ing dependent upon decrease of pressure being to a solenoid coil I0, which is connected to ground caused by some emergency or accomplished by at Il. lThe core I2 of this coil has a Valve stem the operator by reason of some emergency. for the Valve member I3', operating in the valve Referring to the drawings: casing I 4 and limited in its upward movement Figure 1 is a diagrammatic View showing the by a shoulder I5. Its downward movement is 30' arrangement of themechanism for applying and resisted by a helical spring I6. energizing the magnetic brake system upon the The space beneath thevalve member I3 in the disruption of the main power source, which is position shown for the valve is connected to a pipe ordinarily used also for driving' the car on which l1. There is alsov provided an' exhaust I8. The the brakes are mounted; and this view also shows space above the valye member I3 is connected by 35 the. associated mechanism for utilizing the main a pipe I9 to a source of air, designated 20L The power source asa sourc'e'of energization and the air from this reservoir, when the valve member connecting of it to the brakesrand the preliminary I3 is depressed, passes into the valve member 2l applying of the brakes to the rail, or bringing in the space 22 above Ythe piston 23. This piston 40 them within the magnetic zone by using in- 231s connected by a pis y dependent or' ordinary air, that is, by applying of a rotary drum controller 2B. The piston" 23 is air pressure. There is also shown means by` yieldingly supported by the spring 21. which a decrease of air in the automatic or Returning to" the junction point 8, the line 28 emergency line will .bring about the positioning on the lefthand side thereof extends to the junc- 46 or application and energization of the magnetic tion point 29`andthence bywire 3l). to' contact 3|. 451

i This contact 3| is connected by the contact brakes.

Figure2 is asimilarviewshowingthe brake arplunger 32 to the line 33, which passes toy the' rangement in atrailer car. solenoid 34 that draws the magnetic' brake shoe the rail 36, either against Figure 3 isa similar view showing an alterna- 35v downwardly towards 50 tive form oi controller. the rail or into the magnetic zone adjacent theY 50.

Figure 4 is a section through the air control rail'. This brake shoe is normally maintained`- valve, showing the parts in normal operating by the springs 31 from two to three inches above" position. the rail in a safe position. The core 38 engaging Figure 5 is a similar View, showing' them in the the arm 39 when actuated by the solenoid 34;

' emergency application position. serves to press the brake shoe-35finto such mag.- 515x ton rod 24 to an arm`25y 40 Pressure is normally on this line.

netic zone or actually against the rail. The ground 40 is connected with the solenoid to complete that side of the circuit.

Returning to the junction point 29, it will be noted that the Wire 4| is connected to a terminal 42, which in turn, is connected by the contact member 32 tol the contact 43. This contact is connected to a wire 44 that is used to energize the magnet coils 45 and 46 in the magnetic brake shoe 35. These coils are connected together by the wire 41 and thence to the ground 48, completing the circuit.

In the event of failure to deliver power to the car then the line 49 will come into play, as hereinafter described. This line is connected into the drum controller 26 to the contact terminal 50. The terminal 5| of this controller is connected by the line 52 to the positive side of a battery 53. The negative side of this battery is connected by the line 54 to the ground 55. The terminal 56 is connected by the wire 51 to the solenoid coil 58, which is connected to the ground 59. The core of this coil, designated 60, constitutes a valve stem in the main air valve, which will be hereinafter described.

When the controller is rotated and brought into contact-making position, the'contact terminal 6| engages 5|. The terminal 62 engages 50, and the terminal 63 engages 56. These terminals 6|, 62 and 63 are connected to one another by the wires 64, 65, 66 and 61.

Air piping arrangement The numeral 68 designates a controller handle of the controller 69. 'Ihis controller is supplied with air through the pipe 10. It is also provided with an exhaust pipe 1|. The air thus supplied is delivered through the straight air line 12 into a line 13 that extends throughout the car and is connected by suitable hose connections, as illus.

trated, to similar sections of the line in other cars. A branch of this line 13, designated 14, is connected with the main air Valve 15, normally beneath the valve member 16, which is connected to the valve stem 60. A spring 11 is located below this valve, and a spring 18 above it.

The valve member 16 has a cutaway portion 19 on one side thereof. The valve casing 15 has connected to it a pipe from a source of supply, such as 20. This casing is also connected to the pipe 8|, which is used for supplying air to the air switch closing valve 82. The pipe 83 is an exhaust pipe connected into this valve casing 15, The cutaway portion 19 is deep enough to permit of its spanning the open ends of two of the pipes just mentioned. For instance, it willr span pipes 8| and 83 or pipes 88 and 8|.

When the air is applied to the valve 82 the piston 84 and piston rod 85, carrying the contact switch member 32, are moved to the right hand against the spring 86.

Emergency application The automatic or emergency line is designated 81 and communicates by a pipe 88 with the top of the valve casing 15, above the valve piston 16.

Upon a decrease in pressure in this line, either by the actuation of the controller 69 or by operation of the conductors valve 89, or by any other means resulting in a decrease of pressure in the emergency line 81, then the valve member 16 will be moved in such a position as to permit of the application of air from some source, such as 20. This emergency line is connected by suitable hose connections to other cars in the train, when desired.

Referring to Figure 7, when the no-voltage solenoid is deenergize-d by a failure of the power supplied to the car, this solenoid I9 then permits its core and valve stem I2 to drop, and it is so moved downwardly with the spring under the influence of the air from the air pipe I9. At the same time the valve stem |2 is connected to another valve member, co-nstituting the piston 9| in the casing 92. This casing is provided with an exhaust 93 and is also connected by the pipe 94 to the emergency line 81. Upon deenergization of the no-voltage solenoid |0 the piston 9| drops down and permits the air in 81 to exhaust, thereby permitting the air from the source 20 to actuate the piston 84 to close the contacts 3|, 33, 42 and 43..

Electrical actuation of the controller In Figure 3 is shown an alternative means of utilizing an electric circuit for actuating the controller instead off the pneiunatic circuit. When the power source is disrupted the no-voltage relay l0 drops its core 2, which carries on one end a contact member 95 which engages the contacts 96 and 91. The contact 91 is connected to the Wire 98, which is connected to the positive side of the battery 53. The negative side of the battery is connected by the wire 99 to the contact |00, contact |91 and also by the wire |02 to the solenoid coils |03, |04, |05 and |06. The other sides of these coils are connected to the wire |01a, which terminates in the terminal 96.

Upon the energization of thesey solenoids the contact |0| is connected to the contact |01 and thence to ground |08. The contact |09 is connected by the wire ||0l to the line 98. It is connected to the contact upon the closing of its solenoid switch. The contact is connected by the wire ||2 to the Wire 4|. The contact ||3, which is also connected to the wire l0, now engages the contact ||4, which is connected to the wire ||5 that goes to the soleno-id 58. The contact |00 is connected to the contact H6, which in turn, is connected by the wire ||1 to the Wire 30. 'Ihe result is that the controller is closed and the emergency supply of electricity is provided for the magnetization of the brake and the operation of the air which closes the electrical Method of operation In the normal operation of the braking system the operator manipulates the handle 68 of the controller 69 in such a manner as to apply the straight air through the pipes 13 and 14, which leaves the valve member 16 so that the air supply 20 is brought into communication, through the pipe 8| with the switch closing valve 82, and the contacts 3|, 33, 42 and 43 are closed. When this happens the brake shoe 35 is first moved downwardly into the magnetic zone adjacent the rails by the energization of the solenoid 34, and thereafter the brake is magnetized through the coils 45 and 46, due to the fact that the contacts 3| and 33 are made for moving the brake downwardly before the contacts 42 and 43 are made, which latter results in the energization of the brake. This final energization serves to draw the brake from its non-engaging position in the magnetic zone into its rail-engaging position and the braking is accomplished. There may be associated. withthis systemltheusual'timeflimit" disnupten: or=udisconnectorin order todeenergize the brake topermit itsfrem-oval from th'erail, after a predetermined.' periods off time'.

. In' thel event'that for emergency reasons it. is desiredzto apply. the emergency. method. off actuating-this system, the. ainp-ressurein: the line` 8l is decreased eitherI by the position of the-con trollerV or the conductors' valve; or otherwise. This will result in the spring 'Il and such air pressure' asfm'ay be associated therewith, one or both, inv moving the valve memberl? to the position shownin Figure5, whereupon the operation. will be as heretoforev indicated;

In the thirdfcondition', which is-one of primary interest, whenA the sourceof power is disrupted for any` reason the solenoid Illbecomesdeenergized'. Thispermitsthe air: in the line ISI pressing'the valveI I3`idown'so thatair can be delivered to the line l1, into the space 22' to. depress the piston 23and rotate the controller 26. This results in closing the contacts'l, E2 and 63', with the contacts l, 5l.l and' 58 as heretofore explained. Whenv this is done the solenoid 58 is energized and the valve` 16 is pulled up so as to admit air from the source. 20.- into the switch closing valve 82'to-move the contact 32 first, tobridge the gap` betweeny 3`l` and 33 toenergize the solenoid 34 to bringA the brake 35 into f the braking zone, and thereafter to closev the contacts 42. and 43 to energize themagnetic coils of the brake, and effect the braking operation. The source of' energy for these severalv operations is the electrical source, such asa batteryl 53.

The alternative arrangement shownin Figure '7 has already been described;

It will be understoodthatwe desire to comprehend within our inventionv such modifications as comewithin the scope ofourclaimsan'd our invention.

Having thus fully described' our invention; what we claim asn-ewy and desire to secure by vLetters Patent, is:

l. In a magnetic' brake system, a straight' air system, an emergency air system, a main electric power source, a supplementary electric power source, a magnetic brake, means of moving the brake into braking position, means of energizing the'brake, said last-mentioned means being op- .1 erable either from the main electric power source or supplementary power source, and means of' connecting either of said power sources toY the' means for bringing the brake into braking position and for energizing it adaptedto be operable from the straight air-means or the emergency air' means.

V2. In a magnetic brake system, a magnetic track brake, electric'means for moving said brake into braking position, electricYV means for energizm ing said brake, amaineleictricpower source therefor, a supplementary' electric power source therefor, means upon the failure of the main electric power source for connecting the supplementary electric power source in position to be put in circuit with the brake actuating and energizing means; an air circuit for successively closing the brake actuating and energizing circuits, and an emergency air circuit for likewise successively closing said circuits.

3. In a magnetic brake system, a magnetic track brake, electric means for moving said brake into braking position, electric means for energizing said brake, a main electric power source therefor, a supplementary electric power source therefor, means upon the failure of the main electriczpower source-for connecting'the supplementary. electric'. poweri source inl position. tio`- be. put: in. circuit 'with'. the brake actuating and` energizing; means; an ain-circuit' for successively..A closing the: brake actuating, and energizing. circuits, an emergency air` circuit for.l likewise successively closing saidcircuits, andimeans for automatically connecting said electric circuits irrespective of'l the operation of the air circuits in the event. of the disruption of the mainelectric power circuit.

4. In*l a'magnetic' brake system, a. magnetic track brake, electric means for moving the brake into; braking position, electric meansr` for magnetizing'the brake, electric circuits for said means normally open, a main electric power circuit normally connected'to-a pair of'saidcircuits, a supplementary electric sourceof power normally dis-- connected from saidcircuits, means to connect the supplementary electric power means` when the main electric power means fails, electrically operatedmeans for controlling the application off air to close said circuits after the emergency elec-- tric'power means hasbeen connected, means of supplying air therefor; and supplementary straight air means and emergency air means for controlling the application of said air so long as the main electric power circuit is operative.

5, In a magnetic brake system, a magnetic track brake, electric means for moving the brake into braking position, electric means for magnetizing the brake, electric circuits i'orsaid means normallyopen, a mainelectric power circuit normally connected to a pair of said'circuits, a supplementary electric sourcefof power normally disconnected from said circuits, means to connect the supplementary electric power means when the main electric power means fails, electrically operated means for controlling the applicationof air to close said circuits after the emergency electric power means has been connected, means of supplying` air therefor; and supplementary straight air means andA emergency air means track brakeelectricmeans for movingthebrake into braking position, electric. means for magnetizing the brake, electric circuits for said means normally opena main electric power circuit normally connected to a pair of said'circuits,` a supplementary electric source of power normally disconnected from said circuits, meansto connect the supplementary electric power means when the main electric power means fails, electrically operated means for controlling the application. ofjair to close said' circuits.` after the. emergency electric power means has been connected, means of supplying air therefor; and supplementary straight air means and emergency air means for controlling the application of said air so long as the' main electric power circuit is operative, said means for connecting the supplementary electric power to the circuits comprising electrically operated means operable by reason of the disruption of the main electric power supply means.

'7. In a magnetic brake system, a magnetic track brake, electric means for moving the brake into braking position, electric means for magnetizing the brake, electric circuits for said means normally open, a main electric power circuit normally connected to a pair of said circuits, a supforVV controlling the application of said air so long as;

plementary electric source of power normally disconnected from said circuits, means to connect the supplementary electric power means when the main electric power means fails, electrically operated means for controlling the application of air to close said circuits after the emergency electric power means has been connected, means of supplying air therefor; and supplementary straight air means and emergency air means for controlling the application of said air so long as the main electric power circuit is operative, said means for connecting the supplementary electric power means in circuit comprising means operable upon the failure of the main electric power supply means and means operated thereby for opening the emergency air line means and connecting the means for connecting the supplementary electric power means in circuit.

8. In a magnetic brake system, a magnetic brake, means for applying the brake, means for energizing the brake, a main electric supply source, a supplementary electric supply source, a straight air line system, an emergency air line system, means of supplying air for applying and energizing said brake by connection to one of said electric power sources, said air means being adapted to be applied by the reduction of air in the emergency line system or the application of the pressure in the straight air line system; and means controlled by the disruption of the main electric power source for connecting in circuit the supplementary electric power source and of applying the air for closing the circuit to apply and energize the rail brake.

9. In a magnetic brake system, a magnetic brake, means for applying the brake, means for energizing the brake, a main electric supply source, a supplementary electric supply source, a straight air line system, an emergency air line system, means of supplying air for applying and energizing said brake by connection to one of said electric power sources, said air means being adapted to be applied by the reduction of air in the emergency line system or the application of the pressure in the straight air line system, and means controlled by the disruption of the main electric power source for connecting in circuit the supplementary electric power source and of applying the air for closing the circuit to apply and energize the rail brake, said means comprising means to relieve the air in the emergency air line system.

10. In a magnetic brake system, a magnetic brake, means for applying the brake, means for energizing the brake, a main electric supply source, a supplementary electric supply source, a straight air line system, an emergency air line system, means of supplying air for applying and energizing said brake by connection to one of said electric power sources, said air means being adapted to be applied by the reduction of air inthe emergency line system or the application of the pressure in the straight air line system; means controlled by the ydisruption of the main electric power source for connecting in circuit the supplementary electric power source and of applying the air for closing the circuit to apply and energize the rail brake, and means for applying air to actuate connecting means to connect the supplementary electric power means in circuit.

1l. In a magnetic brake system, a magnetic brake, electrical means for applying the brake, electrical means for energizing the brake, means for connecting said last-mentioned means to a source of electrical energy, a main electrical source, a supplementary electrical source, an emergency air means for connecting one of the electrical sources in circuit, a straight air means for alternatively connecting one of the electrical means in circuit, and means controlled by the operation of the main electrical power means for connecting the supplementary electrical power means for use in circuit when the main electrical power means fails.

12. In a magnetic brake system, a magnetic brake, electrical means for applying the brake, electrical means for energizing the brake, means for connecting said last-mentioned means to a source of electrical energy, a main electrical so-urce, a supplementary electrical source, an emergency air means for connecting one of the electrical sources in circuit, a straight air means for alternatively connecting one of the electrical means in circuit, means controlled by the operation of the main electrical power means for connecting the supplementary electrical power means for use in circuit when the main electrical power means fails, and means rendering operative the emergency air line means for closing the circuits in such an event.

13. In a magnetic brake system, a magnetic brake, electrical means for applying the brake, electrical means for energizing the brake, means for connecting said last-mentioned means to a source of electrical energy, a mainelectrical source, a supplementary electrical source, an emergency air means for connecting one of the electrical sources in circuit, a straight air means for alternatively connecting one of the electrical means in circuit, means controlled by the operation of the main electrical power means for connecting the supplementary electrical power means for use in circuit when the main electrical power means fails, and electrically operated means for actuating vthe closing means for the circuits upon the failure of the main electrical power means irrespective of the operation of the emergency.

and straight air line systems.

THEODORE H. SCHOEPF. DAVID M. RITCHIE. 

